seed potatoes arrived today

My seed potatoes from Moose tubers arrived today. My plan: let them sprout a couple weeks, while I amend their beds, then plant them. I have the tubers on my kitchen windowsill so I can watch them sprouting. To amend the beds, I want to add a good 2 inches of compost and dig it in. No scimping this year! I want my spuds in happy soil.